The cutting-edge industrial design of the E4 is a breakthrough in sound isolating earphone technology. Ideal for the business traveler and on-the-go audiophile, the High-Definition Driver with Tuned Port Technology delivers brilliant highs and extended bass that enhance your listening experience with your portable MP3, DVD, and CD players as well as all other audio sources.

Features

• Sound Isolating Technology - The E4's in ear design works like an earplug to block background noise naturally. This enables you to listen comfortably at lower volumes-even in loud environments. And unlike bulky headphones utilizing active noise cancellation technology, no artifacts are introduced into your listening experience. Sound isolating earphones are also much smaller and don't require batteries.
• Speaker Type: High-Definition Drivers with Tuned Port Technology - E4 Sound Isolating Earphones feature High-Definition drivers with Tuned Port Technology for incredible audio reproduction. As the ideal companion to any portable or home audio source, the E4's Tuned Port design improves airflow around the driver to deliver professional-grade sound with extended bass response. (See technical specs)
• Personal Fit Kit - Because every ear is different, E4 Earphones come with a pair of disposable Foam Sleeves, a pair of Triple Flange Sleeves, three pairs (small, medium, large) of Flex Sleeves, and three pairs of Soft Flex Sleeves (small, medium, large) to ensure the ideal personalized fit.
• Secure In Ear Design - The soft, flexible sleeves in the Fit Kit gently contour to the inside of your ear to create a comfortable, secure fit, so that the earphones don't fall out while you're exercising. The E4's are also compatible with custom-molded sleeves, made by a hearing specialist, for the ultimate in fit and comfort. (See custom sleeve information)
• Lightweight Construction - Weighing only 1.1oz (31 g), the E4 is lightweight and secure enough for any portable listening application.
• Earphones Carrying Case - The E4 comes with a stylish, compact carrying case, providing a convenient, tangle-free way to store your earphones.
• Level Attenuator - An included volume level control allows for comfortable listening from any high-output audio source, such as airplane armrests. (See technical specs)

Technical Specifications:

• Speaker Type:  High-Definition Driver with Tuned Port
• Sensitivity (at 1kHz):  109 dB SPL/mW
• Impedance (at 1kHz):  29 Ohm
• Cable Length:  1.52m (60 inches)
• Net Weight:  31g (1.1 oz)
• Input Connector:  3.5 mm (1/8") gold-plated stereo plug

Professional Grade Warranty and Money-Back Guarantee

Every E4 ordered from this website comes with a 30-day, no-questions-asked, money-back guarantee, plus a two-year warranty on materials and workmanship. (See full warranty information)